Surna Light LR one of the series of 15 Low Water Tube Flies presented by, Yuri Shumakov. You can see more of Yuri's flies at The Flies of Jurij (Yuri) Shumakov. See his notes about this fly below.

YURI'S NOTES: Most of these flies are tied in Shrimp style with the use of short half-inch metal tubes. These patterns were tested by author and a group of experienced anglers who helped me to develop and prove this light style flies under 3 years period in salmon rivers of Iceland, Ireland, Kola and Kamchatka Peninsulas (Russia), Norway and Scotland.
I am very thankful to Irish anglers Terrence Dunlop and Peter McIlwaine, Scottish professional fly tier Philip Glendenning, English angler Alec Smith, French angler Jean-Jacques Orzan,
Swedish angler P Aleljung, Italian anglers Franco Sirtori, Marco Cipriani and Vittorio Spasciani. Without their help it would be impossible to visit and to test so many flies in so many rivers!

These flies can be an alternative to flies tied on double and treble hooks and employed not only under summer conditions, but winter ones too. Flies have showed very good results for Atlantic salmon and sea trout, as well as for Rainbow trout and Dolly Varden.